Direct-acting steam-engine



(No Model.) 2 sheets-shed 1.

J. A. GROSHON. DIRECT ACTING STEAM ENGINE.

No. 446,582. atented Feb. 17,1891.

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. Arm/m 2 Sheets-Sheet 2.

(No Model.)

, J. A. GROSHON. DIRECT ACTING STEAM ENGINE.

No. 446,582. Patented Feb. 17,1891.

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JOHN A. GROSHON, OF NE\V YORK, ASSTGNOR OF ONE-HALF TO JOHN LOCKWOOD,'OFJAMAICA, NE\V YORK.

DlRECT-ACTlN G STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 446,582, dated February17, 1891.

Application filed July 5, 1888x $erial No. 279,029. (No model.)

.To CLZZ whom it may concern:

Be it known that 1, JOHN A. GROSHON, a citizen of the United States, anda resident of New York, in the county of New York and State of N ewYork, have invented certain new and useful Improvements in Direct-ActingSteam-Engines, of which the following is a specification.

The invention relates to improvements in direct-acting steam-engines,and pertains, first, to the arrangement of the initial, expanding, andlow-pressure cylinders, the whole, when combined with suitable gearing,forming a direct-acting triple-expansion steamengine, and, second, tothe novel mechanism (hereinafter described) whereby the main piston-rodduring the first portion of its stroke is retarded and during the latterportion of its stroke assisted by pressure from an accumulator.

The object of the invention is to secure economy in the use of thesteam, the arrangement of the cylinders being such as to permit theintroduction of the steam into the same under the exact pressurerequired, according to their area and the work to be performed. Thesteam is first admitted to the initial cylinder under definite pressureand in definite quantity, and this cylinder governs the conditions underwhich the steam enters the expanding and low-pressure cylinders.

The invention will be fully understood from the d etailed descriptionhereinafterpresented, taken in connection with the drawings heretoannexed.

Referring to the accompanying drawings, Figure 1 is a side elevation ofan engine embodying my invention. Fig. 2 is a top plan view of the same,and Fig. 3 is an end View on a smaller scale.

In the drawings, A 13 C designate, respectively, the initial cylinder,the expanding cylinder, and the low-pressure cylinder, the initialcylinder and expanding cylinder being directly in line with each otherand the low pressure cylinder being at one side of the expandingcylinder and in communication with the same through the medium of thesteamchests, (lettered D E, respectively.)

The piston-rods (lettered F G, respectively) are in. connection with thepumps ll I, and the steam-chests are provided with usual ports, valves,and operating-rods J, the initial cylinder being provided with thecustomary Corliss valve-gear, (not shown,) while the ex pan (1-- ing andlow-pressure cylinders are provided with slide-valves.

As indicated in Fig. 2, thelow-pressure cylinder C is provided with anindependent piston-rod F, while the pistons in the cylinders A B areboth connected with a single pistonrod G, this arrangement permittingthe piston-rods to have an alternating reciprocating movement, thepiston in the low-pressure cylinder (J moving to the front end of thecylinder while the pistons in the cylinders A B are traveling in anopposite direction. This part of the invention pertains particularly tothe arrangement of the cylinders, (lettered A B C, respectively,) andhence the usual Corliss valve-gear and connections have been omitted asconstituting no distinct part of the invention and being well understoodboth as to connection and operation. From the initial cylinder A anexhaust-pipe L passes to the steam-chest D, which leads into thecylinder B, whence the steam passes through the steam-chest E into thelow-pressure cylinder 0.

Upon the frame M is pivoted the rocking lever N, (shown more clearly inFig. 1,) having at its upper end the link P, connected by a pivot withthe collar Q, secured to the piston-rod G, the lower end of the rockinglever N being pivoted to the upper section of the hollow telescopicleverT, which upper section (lettered V) fits upon the lower hollow sectionXV of said telescopic lever, as indicated in Fig. 1. The lower sectionIV of the telescopic lever is pivoted in the frame X and is incommunication with the pipe Y, leading from the accumulator Z, thelatterbeing illustrated in Fig. 3, and it consists of the upper and lowersections, containing the pistons having different diameters, asillustrated by dotted lines in said figure, a supply-pipe Ct leading tothe upper side of the piston of larger diameter and a pipe I) passingfrom the lower side of said piston to the condenser of the steam-engine.)Vhen the pipe a is employed for supplying air to the upper side of thepiston, the

pipe I) will be made use of in connection with the condenser for thepurpose of preserving a vacuum in the lower side of said piston. \Vhen,however, water is to be used for creating a pressure on the upper sideof the piston, the pipe I) will be open to the atmosphere. The lowerportion of the accumulator Z, the pipe Y, and the hollow sections V \Vof the telescopic lever will be completely filled with water, which willbe under the pressure of the accumulator Z, (or accumulator of differentform, if desired,) and the object of this pressure, acting through thetelescopic lever 'l, is to create through the rocking lever N aresistance to the movement of the piston-rod G during the first portionof its stroke and to assist the movement of said rod during the latterportion of its stroke.

During the first part of the movement of the piston-rod G, and while thepressure from the accumulator Z is acting to retard the stroke of thepistons in thecylindersAB,the steam will be admitted under-full pressureto the cylinder A, and at about the time the lever N is in a verticalposition the supply of steam will be cut off and the steam alreadywithin the cylinder will have an expansive action While the pressure ofthe accumulator is operating through the pipe Y, the telescopic leversT, and thelever N to assist the movement of the piston-rod G. lhe steambeing cut off from the cylinder A after the piston therein has made aportion of its stroke, that portionthereof within the cylinder A'and thecylinder B expands and moves the piston-rod G outward toward the pump I.After the piston-rod G has about completed its stroke the steam exhaustsinto the steam-chest E and thence into the low-pressure cylinder C andimparts an opposite movement to the piston therein, the piston-rods F Gthus having an alternating reciprocating movement.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is

1. In combination with a direct acting steam-engine, the rocking leverN, in connec-' tion with the piston-rod of same, the hollow telescopiclever T, pipe Y, and accumulator in connection with said pipe,substantially as and for the purposes set forth.

2. In combination with a direct acting steam-engine, the accumulator Z,provided with the piston having two diameters, the pipe Y, leading fromsaid accum ulator, and the hollow telescopic lever consisting of chestsV W,the lower section beingin communication with said pipe and the uppersection being pivoted to the rocking lever N, substantially as and forthe purposes set forth.

Signed at New York, in the county of New York and State of New York,this 3d day of July, A. D. 1888.

' JOHN A. GROSHON.

Witnesses: CHAS. C. GILL, R. A. PoRTEoUs.

